Sudoku #m644

Sudoku game, level: Medium #644. This Sudoku have 27 given numbers (clues)..
Structure: 1 (2 pcs.), 3 (2 pcs.), 7 (2 pcs.), 4 (3 pcs.), 6 (3 pcs.), 8 (3 pcs.), 2 (4 pcs.), 5 (4 pcs.), 9 (4 pcs.), ∑27.


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6
4
8
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9
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9
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8
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7
3
6
2
9
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8
5
9
2
1
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